Optical recording medium having mask layer

Details Optical recording medium having mask layer Optical recording medium having mask layer

1994-12-14

1996-06-25

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Liquid crystal process, composition, or product

43027011, 430945, 430962, G11B 724

Patent

active

055298648

ABSTRACT:
An optical recording medium includes a transparent substrate, a recording layer formed on the transparent substrate, and a mask layer provided between the substrate and the recording layer. A material for the mask layer made of a nonlinear optical material is a photochromic compound, for example, spiropyran, spirooxazine, azobenzene, fulgide, diarylethene, triarylmethane, indigo, etc.

REFERENCES:
patent: 5061582 (1991-10-01), Brettle et al.
patent: 5153873 (1992-10-01), Spruit et al.
patent: 5164287 (1992-11-01), Nagae et al.
patent: 5246758 (1993-09-01), Matsui et al.

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